Metal covered door



July 11, 1939. E. WEISFELD 2,165,430

METAL'COVERED DOOR Filed April 16, 1937 INVENTOR. .Enanael fi/w ATTORNEY Patented July 11, 1939 UNITED STAT FATEN QFFIQE 1 Claim.

This invention relates to an improvement in metal-covered doorsand the object of the invention is to provide such a door as will secure a maximum of protection during fires. The opti-' mum sought in doors of this character is freedom In the accompanying drawing, wherein an embodiment of the invention is shown, Fig. l is a transverse view through one of the door stiles and a part of the panel showing the joint therebetween; Fig. 2 is a front view of the door, complete except for the addition of the molding; Fig. 3 is a sectional view in perspective of a portion of the door at the junction of one of the stiles and rails, and Fig. 4 is a sectional view on the line 4-4 of Fig. 3, looking in the direction of the arrows.

The door frame is preferably composed of wood and comprises the two stiles 5 connected to the top rail 2!! and bottom rail 2| by the conventional tenon joints H. is covered with sheet metal 6 which extends around the stiles and rails and is provided with an inwardly bent flange 8 formed with the projecting portions 7 as clearly shown in Figs. 1 and 3., At the meeting points of the stiles and rails the metal covering 6 is formed with the lock seam Ha, as shown in Fig. 4. The'flange por-.

tions 1 of the covering-also overlap at the corners where the stiles and rails meet as also clearly shown in Fig. 3.

The inner edges of the stiles and rails are formed with longitudinally extending grooves 3 in which a channel-shaped metal lining strip 4 is located, said strip being formed with laterally bent flanges 2 which overlie the face of the inner edges of the stiles and rails beneath the inturned flanges 8 of the outer metal covering 6. As will be seen in Figs. 1 and 3, the channel-shaped strip 4 does not completely fill the groove 3, but normally permits the existence of a passage between its inner end and the inner termination 15 of the groove. caused by heating of the door elements during a fire and it also provides a passage for air or gasgenerated by heat, said groovescommunicating with the vent passages or ports [2 leading through the top and bottom rails to atmosphere.

The door panel consists of a filling 9 of any The frame thus formed This constitutes room for expansion (CI. 20-35) v suitable material, such as a fibrous substance, having its opposite faces covered with sheet metal iii. The edges of the panel are received in the channels in the strips 4, and the panel and the strips d are secured in position in the grooves 3 by the dowels l or other fastening elements which pass through the panel, through the strips 4 and through the portions of the stiles and rails on the opposite sides of the groove 3. Lateral flanges 1 formed on the covering 6 overlie the faces of the panel, and nails or other fastening members l4 extending through the flanges 8 and through the flanges 2 on channels 4, enter the inner edges of the stiles and rails and hold the door assembly together. Flanges l and 8 are covered 15 and concealed by molding l6, secured as indicated in dotted lines [6 in Fig. 1, on both faces of the panel.

Under the imposition of heat, as during a conflagration, it has been found by actual test that a door of this construction will greatly resist the effect of the fire for a surprising length of time due to the manner in which the metallic covering completely covers all interior wooden parts of the door; due also to the latitude for expansion provided by means of the channels or grooves 3 and the communicating ports l2 which allow the escape of internal vapors or gases created within the door by the heat. At the same time, the door is light in weight and extremely easy of installation.

What I claim is:

A metal covered door provided with stiles and rails secured together to form a frame, a sheet metal covering extending over and enclosing the stiles and rails, said stiles and rails each having a longitudinal groove formed in their inner edge, a channelled lining strip fitted into each of said grooves, said strip having laterally extending flanges extending over the face of the inner edges of the stile and rail in which itis located, a panel having its edges fitted into said strips, pins extending through the panel near its edges and also through the channelled strips to hold the strips and panel edges within the grooves, the sheet metal covering having a flanged inner edge bent over and covering the laterally extending flanges on the channelled strips and also enclosing and covering the pins said flanged inner edge overlying the opposite faces of the panel adjacent to its point of entry into the channelled strip.

EMANUEL WEISFELD. 

